<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>关于孙子元素溢出是否影响爷爷滚动条显示</title>
  <style>
    div{
      width:100px;
      height:100px;
    }
    .f{
      overflow: auto;
    }
    .s{
      width:100px;
    }
    .gs{
      width:200px;
    }
  </style>
</head>
<body>
答案是会的!
<div class="f">
  <div class="s">
    <div class="gs"></div>
  </div>
</div>
<script>
  console.log(document.querySelector('.f').clientWidth) // 83
</script>
</body>
</html>
